VDB-186528 · CVE-2021-40871 · GCVE-0-2021-40871

Softing OPC UA C++ SDK prior 5.66 Message type confusion

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
6.2	$0-$5k	0.00

Summaryinfo

A vulnerability was found in Softing OPC UA C++ SDK. It has been declared as problematic. Affected by this issue is some unknown functionality of the component Message Handler. The manipulation results in type confusion. This vulnerability was named CVE-2021-40871. The attack may be performed from remote. There is no available exploit. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, was found in Softing OPC UA C++ SDK. Affected is some unknown processing of the component Message Handler. The manipulation with an unknown input leads to a type confusion vulnerability. CWE is classifying the issue as CWE-843. The product allocates or initializes a resource such as a pointer, object, or variable using one type, but it later accesses that resource using a type that is incompatible with the original type. This is going to have an impact on availability.

The weakness was presented 11/11/2021. The advisory is shared for download at industrial.softing.com. This vulnerability is traded as CVE-2021-40871 since 09/13/2021. There are neither technical details nor an exploit publicly available.

Upgrading to version 5.66 eliminates this vulnerability.

VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Vendor

Softing

Name

OPC UA C++ SDK

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.5
VulDB Meta Temp Score: 6.2

VulDB Base Score: 6.5
VulDB Temp Score: 6.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AV	AC	Au	C	I	A
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💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Type confusion
CWE: CWE-843
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: OPC UA C++ SDK 5.66

Timelineinfo

09/13/2021 🔍
11/11/2021 +59 days 🔍
11/11/2021 +0 days 🔍
11/12/2021 +1 days 🔍

Sourcesinfo

Advisory: industrial.softing.com
Status: Confirmed

CVE: CVE-2021-40871 (🔍)
GCVE (CVE): GCVE-0-2021-40871
GCVE (VulDB): GCVE-100-186528

Entryinfo

Created: 11/11/2021 07:30
Updated: 11/12/2021 17:39
Changes: 11/11/2021 07:30 (38), 11/12/2021 17:39 (1)
Complete: 🔍
Cache ID: 216::103